A.O. Smith GPDH, GPDX, GPDT owner manual Temperature Regulation, Filling

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OPERATION

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER. DO NOT ATTEMPT TO OPERATE HEATER WITH COLD WATER INLET VALVE CLOSED.

FILLING

1.Close the heater drain valve by turning handle clockwise, Figure 1.

2.Open a nearby hot water faucet to permit the air in the system to escape.

3.Fully open the cold water inlet pipe valve allowing the heater and piping to be filled, see Figure 1.

4.Close the hot water faucet as water starts to flow.

5.The heater is ready to be operated.

TEMPERATURE REGULATION

DANGER

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE PAINFUL SCALDING WITH POSSIBLE SERIOUS AND PERMANENT INJURY. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON’S AGE AND THE TIME OF THE EXPOSURE. THE SLOWER RESPONSE TIME OF CHILDREN, AGED OR DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.

THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS. IF A SUITABLE AREA IS NOT AVAILABLE, A COVER SHOULD BE INSTALLED OVER THE THERMOSTAT TO PREVENT TAMPERING.

It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy efficient operation of the water heater. The water temperature setting was factory set at the lowest temperature; Pressing the "COOLER" button decreases temperature and pressing the "HOTTER" button increases the temperature.

SETTING THE WATER HEATER TEMPERATUREAT 120°F (49°C)

(APPROX. “” MARK ON TEMPERATURE SETTING OF GAS VALVE) WILL REDUCE THE RISK OF SCALDS. Some states require settings at specific lower temperatures.

Figure 28 shows the approximate water temperatures produced at various thermostat dial settings. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 30°F (-1°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards.

Valves for reducing the point of use temperature by mixing cold and hot water are available, see Figure 2. Also available are inexpensive devices that attach to faucets to limit hot water temperatures. Contact a licensed plumber or the local plumbing authority.

To avoid any unintentional changes in water temperature settings, the control has a tamper resistant feature for changing the temperature setting. To change the temperature setting follow these instructions:

1."Wake Up" the temperature indicators by holding down both "COOLER" and "HOTTER" temperature adjustment buttons at the same time for one second, see Figure 28. One or two of the temperature indicators will light up. These indicators will only remain on for 30 seconds if no further buttons are pressed. After 30 seconds the control will go back to "Sleep" mode.

2.Release both of the temperature adjustment buttons.

A.To decrease the temperature press and release the "COOLER" button until the desired setting is reached.

B.To increase the temperature press and release the "HOTTER" button until the desired setting is reached.

NOTE: Holding down the button will not continue to lower or raise the temperature setting. The button must be pressed and released for each temperature change desired.

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MAIN MANUAL GAS SHUTOFF VALVE TO THE APPLIANCE, SEE FIGURE 1(G).

 

 

Time to Produce

 

Display

2nd & 3rd Degree

Temperature Setting

A B C Burns on Adult Skin

C=Flashing=approx. 160°F(71oC)

 

About 1/2 seconds

C = Approx. 150°F(66oC)

 

About 1 1/2 seconds

B = Approx. 140°F(60oC)

 

Less than 5 seconds

A = Approx. 130°F(54oC)

 

About 30 seconds

= Approx. 120°F(49oC)

 

More than 5 minutes

WARM = Approx. 80°F(27oC)

 

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FIGURE 28.

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Contents Residential With HOT Surface Ignition Replacement Parts and Deliming ProductsGAS Model Chemical Vapor Corrosion External DamageExtended NON-USE Periods Insulation BlanketsWater Connections Location of HeaterWater Potable Heating Space Heating GAS Connections Closed Water SystemVenting Venting Through an Outside Wall Clearances Combustion AIR and ExhaustVenting Through AN Outside Wall Wire FenceVenting Through Roof Clearances Vent piping can be installed as follows Venting System Example Installation For ALL ModelsDIA. Vents Number of 90 DEG Vent Pipe Separation Approximate Setting Time for 2-1/2 to 4 Pipe JointsCementing PVC, ABS or Cpvc Pipe and Fittings Movement Complete Joint SETConnecting Vent to Blower WiringVenting Through a Roof ElbowsOptional Field Installed Wiring Do not TRY to Light the Burner by Hand What to do if YOU Smell GASFilling Temperature RegulationVenting Manual Reset Switch High Altitude InstallationWater Heating Ignition Sequence Control Sequence HOT Surface Direct IgnitionPower Venter Maintenance High Temperature Limit SwitchMain Burner Venting SystemThermostat and GAS Supply Check Service and RepairWater Heater Control LED Status Problem Solution Trouble ShootingVent Pipe TOO HOT HOT WaterYellow Flame CondensationLimited Residential GAS Warranty Southeast Parkway FRANKLIN, TN

GPDT, GPDH, GPDX specifications

A.O. Smith is a renowned leader in the manufacturing of water heating solutions, and its series of gas water heaters, including the GPDT, GPDH, and GPDX models, are emblematic of the company’s commitment to innovation, efficiency, and reliability.

The A.O. Smith GPDT series is characterized by its high energy efficiency and robust design. With a 40-gallon capacity, it utilizes a 0.67 energy factor, making it an ideal choice for both residential and light commercial applications. This model features a unique combustion system that minimizes emissions while maximizing hot water output. Equipped with a powered draft system, the GPDT series effectively vents combustion gases, improving air quality and lowering operational costs.

In contrast, the GPDH series is particularly notable for its compatibility with high-efficiency gas appliances. It employs a direct vent system, allowing for versatile installation options. The GPDH models also include advanced diagnostics and a LED display that simplifies monitoring and maintenance. With an enhanced insulation design, these heaters minimize heat loss, effectively optimizing performance and energy savings.

The GPDX series capitalizes on cutting-edge technologies to provide superior performance. With capacities ranging from 30 to 50 gallons, these water heaters are designed to meet varying needs. The GPDX is equipped with a dual-purpose valve that offers superior temperature control and safety features, ensuring user convenience and peace of mind. Its intuitive interface allows users to easily set their desired water temperature and monitor performance metrics.

One of the key characteristics that unify the GPDT, GPDH, and GPDX models is their commitment to durability. A.O. Smith incorporates high-quality materials and innovative engineering processes to enhance the longevity of their products. Each model features an impressive warranty, demonstrating the company’s confidence in their craftsmanship.

In conclusion, A.O. Smith's GPDT, GPDH, and GPDX gas water heater series offer a blend of efficiency, performance, and innovation. These models are equipped with advanced technologies designed to provide users with reliable hot water solutions while minimizing energy consumption. With their robust build, user-friendly features, and impressive warranties, A.O. Smith continues to be a top choice for those seeking dependable gas water heating solutions.
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